Cle Elum Lake is a lake and reservoir along the course of the Cle Elum River, in Washington state USA. At the site of the future city of Cle Elum, Washington, a Northern Pacific Railway station was named Clealum after the name Tle-el-Lum (tlielləm), meaning "swift water", referring to the Cle Elum River. The lake was also labeled as Kleattam Lake in maps of the 1850s.